Method of making calcimine.



UNITED STATES PATENT OFFICE.

LLOYD WILLIAM COLLISTER, OF FARMINGTON, IOWA.

METHOD OF MAKING CALCIMINE.

No Drawing.

To all whom it may concern:

Be it known that I, LLOYD WV. COLLISTER, a citizen of the United States, residing at Farmington, in the county of Van Enron and State of Iowa, have invented a new and useful Method of Making Caleimine, of which the following is a specification.

This invention relates to a method of making calcimine.

The object of the invention is, in a ready,

' sary to obtain the highest class of ornamentation.

Heretofore, owing to the quick setting of the calcimine, it has been practically impos sible even without stippling, as this would require additional help, for two workmen to apply a calcimine wash to an ordinary sized continuous surface and secure a smooth and finished appearance, and the omission of the stippling is a serious matter, as it is an essential procedure in order to eliminate brush marks, to conceal the defects in the plaster, and to efiect the uniform distribution of the color.

With the wash of the present invention, one workman can apply the calcimine and stipple a sixteen or eighteen foot square room alone and get good results, thereby not only imparting a more artistic appearance, to the work, but greatly reducing the cost of its production.

With the above and other objects in view, as will appear as the nature of the invention is better understood, the same consists, gen

erally stated, in addlng to an ordinary calcimine wash containing a coloring matter, Whiting and glue, a substance that will be hygroscopic in character, thus to cause it to retain the moisture of the wash for a suilicient period to permit proper working before drying. The substance employed for this purpose is lump starch, preferably such as is used in laundry work, although edible starch could be employed, and this can be Specification of Letters Patent.

Application filed March 23, 1911.

Patented Mar. 26, 1912.

Serial No. 616,513.

mixed with any calcimine wash on the market that contains whiting and glue, as nearly all do. From practical experience it has been demonstrated, that where a calcimine wash is incorporated with a carbohydrate in the form of starch, that it will retain the moisture for thirty minutes or longer, thus giving the workman ample time not only to blend the edges of the different stretches but also to stipple, and thus produce a highly artistic effect.

In carrying out the invention, the following ingredients are employed in substantially the proportions specified by measure: English clitfstone whiting, thoroughly bolted, 14 parts, finely ground animal glue, 1 part, lump starch 1 part, water 7 parts. Where dry colors are added, their weight must be subtracted from the proportion of the whiting.

The procedure of preparing the wash is as follows :The whiting, coloring matter, if dry, and ground glue are thoroughly mixed in dry form. The starch is then dissolved in two parts of lukewarm water, after which five parts of boiling water are added and the mass cooked to a smooth paste of about the consistency of cream. While still hot, the liquid starch is poured into the coloring matter, whiting and lue, and the Whole stirred continuously, 1111(81' requisite heat, till the glue is dissolved. If a heavy stipple be desired, the wash will be used in a comparatively thick state, but if a fine stipple be desired, the wash can be thinned with cold water.

When this compound is dry, the effect on the surface is of velvety character, and there will be no danger of the stipple flowing down flat, as results when wheat or rye flour paste is employed. Lump starch is used because it will stand out in coarse stipple, and can be stippled down as fine as required.

The improvements herein described, while simple in character, will be found of the highest efliciency in use and will result in the production of a calcimine wash having properties not heretofore possessed in the art.

What is claimed is The method 'of preparing a calcimine wash which consists in thoroughly mixing together fourteen parts of bolted whiting and one part of ground glue in dry form, then separately dlssolving one part of starch in two parts of lukewarm water, then adding five parts of boiling Water to the starch, and my oWn, I have hereto afiixecl my signature cooking to a smooth paste of about the conin the presence of two Witnesses.

sistency of cream then pourin the starch ,7 paste While hot into the mixture of Whiting LLOYD ILLIAM OOLLISTER and glue, and finally stirring continuously Vitnesses:

until the glue is dissolved. EDWARD H. VVIEGNER,

In testimony that I claim the foregoing as PHIL K. WARE.

vCopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

